Adult Tree DBH, Distance, & Condition at York University's Woodlot

Method: On September 23, 2014, our Ecology lab group, led by our teacher assistant Taylor Noble, split up into 3 groups. After walking to the grassland and woodlot area of York University – Keele Campus, each group was responsible for collecting 4 datasets. The grassland and woodlots were still in fairly good condition, given the time of year, and there were many plants and trees to study. Our group members were Jason, Coleen, Leeron, Zainab and Sanaz. The following dataset is for the third dataset collected. In this dataset, a transect was placed on the ground through the woodlot beginning at a random adult tree observed. Adult trees were identified if the height of the tree was approximately twice Sanaz’s height of approximately 160cm. For each adult tree, the distance between the trees and the diameter breast height (dbh) of the trunk were measured in centimeters using a second transect measuring tape. These measurements were taken by the same person and recorded. The condition of each adult tree was also ranked from 0 – 2 by group members, and recorded. If the condition of the tree was dead, it was ranked 0, if it was living, it was ranked 1, and if it had a huge green canopy, it was ranked 2. In total 10 adult trees were observed and the above-mentioned measurements were recorded for each.

研究方法：2014年9月23日，由助教泰勒·诺布尔（Taylor Noble）带领的生态学实验室小组划分为3个小组。在步行抵达约克大学基尔校区（York University – Keele Campus）的草原与林地区域后，每个小组负责采集4组数据集。结合当时的季节，该区域的草原与林地生态状况仍较为良好，拥有大量可供研究的植物与树木。我们小组的成员包括杰森、科琳、利隆、扎伊纳布与萨纳兹。以下为本次采集的第三组数据集的相关信息。本数据集以林地内随机观测到的一株成年树木为起点，沿林地布设地面样带（transect）。成年树木的判定标准为树高约为萨纳兹身高（约160cm）的两倍。针对每株成年树木，使用第二卷样带卷尺测量其与起点树木之间的距离，以及树干的胸径（diameter breast height，dbh），测量单位均为厘米，所有上述测量均由同一人完成并记录。小组成员同时对每株成年树木的健康状况进行0至2级的评分并记录，评分规则如下：树木死亡则记为0，存活状态记为1，若拥有茂密翠绿的冠层则记为2。本次共观测到10株成年树木，并为每株记录了上述所有测量指标。